I think it's important, that those that know, advise those that don't, what they mean by " can be " and " as long as "....My point is this, when I think of wether an amp is adequate, I'm not thinking of wether it is adequate for 95% of daily circumstances. I'm thinking of the 5% of....I wouldn't say extreeme, but out of ordinary...maybe. If I'm buying all this high end equipment, it BETTER be able to handle anything I come accross musically, without "failing" under non abusive situations....If on the odd occasion, I listen to some clasical Bach Organ Concert, and the organist hits that deep low end pipe, and I have the volume at medium high enjoyable level, and the headpone gives me back distortion, because it has run out of the power, that should have been adequately supplied to the amp, if the proper amp was selected...If this happens, to me - this amp just failed, and in my book, is not "good enough", when my investment in audio gear seems to grow higher and wider in scope and money...I EXPECT my system to be able to meet anything WITHIN reason I throw at it....If I didn't have this expectation, I wouldn't be spending this money, and I'd be one of those average Joes, with a $ 15 pair of earbuds hooked to my phone, smiling away...but that's not me....I spend more, I expect more...."Experts" giving advice to some newbee that...sure -your planar magnetic headphones don't REALLY need an amp, and sure that toy with the name FIIO on it, can power these headphones, are maybe not misleading these newbees, but you should let these folks know, that they should first hear their headphones, with a sampling of their most "Demanding" music they listen to, and listen to it at the upper ends of the volume level they might listen to it, it the noisiest environment they might expect to experience listening....let them hear it through one of the upper end amps, like a lyr, then, let them hear it through one of these toy amps,,,,and they will most probbly say, wow, I didn't realize just how much better my expencive headphones could sound....They don't know yet, because all they have experioenced is a mediorcre experience, and they simply dont know better...Folks, you arent investing this kind of money, to listen to headphones, that only sound " OK " unamped...Experts, you should advise these complacent ignorant ( Not an insult)...OK - If you like them unamped or with cheapo FIIO's, before you term yourself satisfied...Go see what they are really capable, under the most demanding situations....Me, I prefer " More than I need " in 95% of circumstances, so when that 5% comes along, I cruze through it, cause I'm prepared, and I don't even know, I just utilized that upper end of my systems capabilites, Because this is why I spend the money...So I don't get pissed off by shortcommings in any situation....If you can live with shortcommings, fine - not me. BTW, I'm no " Audiophile " expert...just an "educated enthusiast" maybe....Educate yourself.